rs2@houxu.UUCP (Robert Switzer KA2CZU) (07/01/87)
Sorry to ask this since I know a list of known "working" MINIX machines has already been posted, however, I just received MINIX-THE FLOPPIES, and am wondering they won't work on my PC6300 Plus. So I was wondering if any other AT&T MINIX-ites had gotten MINIX working on the Plus? Thanks, Robert S. p.s. I get to the point where /etc/rc is *supposed* to run asking me to insert the /usr floppy when everything stops. Characters get echoed but that's all. My next move is to try the floppies on a real IBM AT. p.p.s. yes I know that MINIX is "working" on the PC6300. -- <Disclaimer: the above are my sole representations and not the official opinion of my employer> Robert Switzer KA2CZU - AT&T Rm 2J208, Holmdel, NJ (201)949-7281
tbm@homxc.UUCP (T.MERRICK) (07/02/87)
> Minix won't boot on 6300+. Quits at the time /etc/rc is supposed to run.
I had identical experience on an ATT 6300+ when using the AT 1.2 meg
disks on drive A, a 1.2meg unit.
I then tried the disks formatted for the PC (360k) and Minix booted just fine!
I did not get to try the hard disk.
I tried to mount a FS on drive B (a 360k) and could not.
The same FS would mount nicely on the 1.2meg unit. (Curious???)
I have not tried any patches except an early one on the 1.2meg set. I forget
the purpose of that patch, but it did not good at all.
Tom Merrick ATT BTL Andover MA.kav@ihlpa.ATT.COM (K. Vangsness) (07/02/87)
MINIX does work on the 6300+. I have a 6300+ the came with a 360K floppy and was able to boot up the 360K MINIX floppys with no problem. For reasons that I don't yet understand, the same floppys do not work on the plus if it has a 1.2MB floppy. (I know because I just upgraded my system to a 1.2MB floppy and I can no longer boot MINIX - all other 360K floppys work fine) The system comes up, process 3 starts up (a shell reading /etc/rc?) and eats lots of CPU time. When I was able to boot my 6300+ on MINIX, I got the hard disk working. This required the following changes: (sorry I'm not specific here, but I don't have the changes handy - If anyone wants the actual changes, send me mail.) Force the cpu type (in main.c) to be an XT. The 6300+ looks like an AT to MINIX, but the hard disk interrupts at the XT vector. Apply Gary Olivers fixes to the xt_wini driver. I Then had to hard code the disk parameters for the 20 MB drive into the drive initialization function. For some reason it though the hard drive had 5 heads! The values I used were 4 heads, 611 cylinders, control byte = 5. Also, my hard disk has a defect at cylinder 46. Has anyone modified mkfs so that it will take bad blocks out of the free list? Kurt Vangsness AT&T Bell Laboratories - Naperville, Ill ihnp4!ihlpa!kav